Superconducting materials performance report, May 1, 1992--February 28, 1993

Technical Report · Wed Jan 01 04:00:00 EST 1992

DOI:https://doi.org/10.2172/7018263· OSTI ID:7018263

Ruvalds, J

An unusual frequency and temperature variation of the spin susceptibility for electrons or holes whose Fermi surfaces exhibit nesting. This explains the electronic transport properties of high temperature superconductors (HTS), including optical reflectivity and Raman spectra. Direct evidence for predicted scaling of susceptibility as a function of frequency/T was detected by neutron scattering on two series of cuprate superconductors. Calculations were extended to electronic structure models for generating lineshapes that may be tested. Good agreement with T and frequency variation of susceptibility measured by neutrons is achieved in the nesting regime. These findings are relevant to anomalous linear temperature variation of electrical resistivity characteristic of HTS. Electron-electron scattering processes become dominant in nested surfaces if the Coulomb interaction between charges is of intermediate strength.

• Research Organization: Virginia Univ., Charlottesville, VA (United States). Dept. of Physics
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG05-84ER45113
• OSTI ID: 7018263
• Report Number(s): DOE/ER/45113-T4; ON: DE93002786
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
COUPLING
DOCUMENT TYPES
ELECTRON LOSS
ELECTRON-ELECTRON COUPLING
ENERGY LEVELS
FERMI LEVEL
FREQUENCY DEPENDENCE
HIGH-TC SUPERCONDUCTORS
OPTICAL PROPERTIES
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PROGRESS REPORT
RAMAN SPECTRA
REFLECTIVITY
SPECTRA
SPIN
STRUCTURE FACTORS
SUPERCONDUCTORS
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE